Task View Not Seen by End-User, Though Allowed Through Menu Filtering

The task view is set to allowed in menu filtering mode, but user is unable to see the task view with his role. I know of one possible reason: localization of user is not the same as the task view - but this is definitely not the cause since we have checked the localizations (aka country code).

Anotheer possible reason we thought of is that since the application security on a role (different from the one with menu filtring set to allowed) with a higher sequence is set to N, the system automatically disables the user from viewing the task view - but we don't know if this is true.

Kindly advise/confirm our assumption, or if there are other possible reasons why a user cannot see the task view despite it being enabled via menu filtering.